Fix ESA burst DB broken url

docs/notebooks/walkthrough-basic.ipynb

@@ -158,7 +158,7 @@
    "metadata": {},
    "outputs": [
     {
-     "name": "stdin",
+     "name": "stdout",
      "output_type": "stream",
      "text": [
       "Enter your ASF username:  \n",
@@ -260,7 +260,7 @@
     "See the [OPERA CSLC documentation](https://d2pn8kiwq2w21t.cloudfront.net/documents/OPERA_CSLC-S1_ProductSpec_v1.0.0_D-108278_Initial_2023-09-11_URS321269.pdf) for the full filename convention, but the main points are\n",
     "\n",
     "- `T078` is Sentinel-1 track (relative orbit) 78\n",
-    "- 165573 the Burst IDs from [ESA's Burst database](https://sentinel.esa.int/web/sentinel/-/publication-of-brust-id-maps-for-copernicus-sentinel-1/1.1).\n",
+    "- 165573 the Burst IDs from [ESA's Burst database](https://sar-mpc.eu/test-data-sets/).\n",
     "- `IW2` indicates these are from the first subswath (since the \"Burst ID\" is repeated for subswaths IW1,2,3.)\n",
     "- `20210606T005130Z` is the acquisition datetime\n",
     "\n",